/* W-1 Security Foundation — cyber-defense theme
   palette: deep navy / cyber-cyan / alert-red / signal-green / slate
   typography: IBM Plex Sans (body) + JetBrains Mono (display/code) + IBM Plex Serif italic (accent)
*/

:root {
  --bg-0: #060b18;
  --bg-1: #0b1428;
  --bg-2: #131e36;
  --bg-3: #1c2a47;
  --line: #233357;
  --line-bright: #2f4677;
  --ink: #e8eefc;
  --ink-dim: #a4b1d0;
  --ink-mute: #6b7aa1;
  --cyan: #4adfff;
  --cyan-2: #00b6d6;
  --cyan-dim: rgba(74, 223, 255, 0.16);
  --red: #ff5874;
  --red-dim: rgba(255, 88, 116, 0.16);
  --green: #46e6a0;
  --green-dim: rgba(70, 230, 160, 0.14);
  --amber: #ffc857;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.04), 0 8px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 0 1px rgba(74,223,255,0.4), 0 0 28px rgba(74,223,255,0.18);
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  --font-serif: 'IBM Plex Serif', Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 20% -10%, rgba(74,223,255,0.07), transparent 50%),
    radial-gradient(circle at 80% 110%, rgba(255,88,116,0.05), transparent 50%);
  background-attachment: fixed;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-2); }

/* ────────────── BOOT / LOGIN ────────────── */

.boot-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  color: var(--cyan);
}
.boot-line { letter-spacing: 0.04em; }
.boot-line::after {
  content: '▌';
  animation: blink 1s steps(2) infinite;
  margin-left: 4px;
}
@keyframes blink { 50% { opacity: 0; } }

.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background:
    linear-gradient(180deg, var(--bg-0), var(--bg-1));
}
@media (max-width: 860px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-poster { display: none; }
}

.login-poster {
  padding: 64px;
  border-right: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 39px, rgba(74,223,255,0.04) 40px),
    repeating-linear-gradient(90deg, transparent 0, transparent 39px, rgba(74,223,255,0.04) 40px),
    linear-gradient(160deg, var(--bg-1), var(--bg-0));
}
.login-poster::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 30%, rgba(74,223,255,0.18), transparent 50%),
    radial-gradient(circle at 30% 80%, rgba(255,88,116,0.10), transparent 55%);
  pointer-events: none;
}
.login-poster > * { position: relative; z-index: 1; }
.poster-mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}
.poster-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.02;
  margin: 28px 0 14px;
  letter-spacing: -0.02em;
}
.poster-title em {
  font-style: italic;
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--cyan);
}
.poster-sub {
  color: var(--ink-dim);
  max-width: 38ch;
  font-size: 15px;
}
.poster-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.poster-meta .k { color: var(--cyan); letter-spacing: 0.12em; text-transform: uppercase; display: block; margin-bottom: 4px; }
.poster-meta .v { color: var(--ink); font-size: 14px; }

.login-form-wrap { padding: 64px; display: grid; place-items: center; }
.login-card {
  width: 100%;
  max-width: 380px;
}
.login-card h2 {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 28px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.login-card .hint {
  color: var(--ink-mute);
  font-size: 13px;
  font-family: var(--font-mono);
  margin-bottom: 28px;
}
.login-card .hint::before { content: '// '; color: var(--cyan); }

/* ────────────── FORMS ────────────── */

label.field {
  display: block;
  margin-bottom: 14px;
}
label.field > span {
  display: block;
  font-size: 12px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
input[type="text"], input[type="password"], input[type="number"],
input[type="email"], textarea, select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 15px;
  background: var(--bg-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-dim);
}
textarea { min-height: 90px; resize: vertical; font-family: var(--font-body); }

button, .btn {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.04em;
  background: var(--cyan);
  color: var(--bg-0);
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  transition: transform 0.08s, box-shadow 0.15s, background 0.15s;
}
button:hover { background: #6fe7ff; box-shadow: var(--shadow-glow); }
button:active { transform: translateY(1px); }
button.ghost {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--line-bright);
}
button.ghost:hover { background: var(--cyan-dim); box-shadow: none; }
button.danger { background: var(--red); color: #fff; }
button.danger:hover { background: #ff7a90; }
button.sm { padding: 6px 12px; font-size: 12px; }

.err {
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 13px;
  margin: 10px 0;
}
.err::before { content: '[ERROR] '; }
.ok {
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 13px;
  margin: 10px 0;
}
.ok::before { content: '[OK] '; }

/* ────────────── LAYOUT ────────────── */

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 56px 1fr;
}
@media (max-width: 880px) {
  .shell { grid-template-columns: 1fr; grid-template-rows: 56px auto 1fr; }
  .sidebar { border-right: none !important; border-bottom: 1px solid var(--line); position: static !important; }
}

.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.topbar-brand .dot {
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2.5s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 8px var(--green); }
  50%      { box-shadow: 0 0 18px var(--green); }
}
.topbar-brand .tag {
  font-size: 11px;
  color: var(--cyan);
  background: var(--cyan-dim);
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.topbar-user .name { color: var(--ink); }
.topbar-user .role { color: var(--ink-mute); }
.topbar-user .role::before { content: '· '; }

.sidebar {
  background: var(--bg-1);
  border-right: 1px solid var(--line);
  padding: 18px 12px;
  overflow-y: auto;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
}
.sidebar-section {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 14px 12px 6px;
}
.nav-item {
  display: block;
  padding: 9px 12px;
  color: var(--ink-dim);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  margin: 2px 0;
  border-left: 2px solid transparent;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.nav-item:hover { background: var(--bg-2); color: var(--ink); }
.nav-item.active {
  background: var(--bg-2);
  color: var(--cyan);
  border-left-color: var(--cyan);
}
.nav-item .badge {
  float: right;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-3);
  color: var(--ink-mute);
  padding: 1px 7px;
  border-radius: 10px;
}

.main {
  padding: 28px 36px 56px;
  overflow-x: hidden;
}
@media (max-width: 600px) {
  .main { padding: 20px 16px 40px; }
}

.page-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 18px;
  flex-wrap: wrap;
}
.page-head h1 {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  margin: 0;
  letter-spacing: -0.01em;
}
.page-head .crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.page-head .crumbs::before { content: '$ '; color: var(--cyan); }

/* ────────────── PANELS / CARDS ────────────── */

.panel {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 18px;
  position: relative;
}
.panel-title {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.panel-title::before {
  content: '◆';
  color: var(--cyan);
  font-size: 11px;
}

.grid {
  display: grid;
  gap: 16px;
}
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 800px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.stat {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}
.stat::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50px; height: 50px;
  background: radial-gradient(circle, var(--cyan-dim), transparent 70%);
}
.stat .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.stat .v {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--cyan);
  margin-top: 4px;
  letter-spacing: -0.02em;
}

/* ────────────── TABLES ────────────── */

.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.tbl th, .tbl td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.tbl th {
  background: var(--bg-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
}
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: rgba(74,223,255,0.04); }
.tbl td.mono { font-family: var(--font-mono); font-size: 13px; color: var(--ink-dim); }
.tbl-actions { display: flex; gap: 6px; }
.tbl-wrap { overflow-x: auto; }

/* ────────────── MODULE / SECTION ────────────── */

.module-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  cursor: pointer;
  transition: border-color 0.18s, transform 0.18s;
  position: relative;
  overflow: hidden;
}
.module-card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.module-card .mid {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.module-card .mtitle {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 19px;
  margin: 8px 0 6px;
  letter-spacing: -0.01em;
}
.module-card .mblurb { color: var(--ink-dim); font-size: 14px; min-height: 56px; }
.module-card .mfoot {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.module-card .mfoot .done { color: var(--green); }

.progressbar {
  height: 4px;
  background: var(--bg-3);
  border-radius: 2px;
  margin-top: 12px;
  overflow: hidden;
}
.progressbar > div {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-2), var(--cyan));
  transition: width 0.4s;
}

.section-list { display: flex; flex-direction: column; gap: 10px; }
.section-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}
.section-row:hover { border-color: var(--cyan); }
.section-row .stitle { font-weight: 500; }
.section-row .sno { font-family: var(--font-mono); color: var(--cyan); font-size: 13px; margin-right: 12px; }
.section-row .schk { font-family: var(--font-mono); font-size: 12px; color: var(--ink-mute); }
.section-row.done { border-left: 3px solid var(--green); }
.section-row.done .schk { color: var(--green); }
.section-row.done .schk::before { content: '✓ '; }

.section-body { line-height: 1.7; color: var(--ink-dim); }
.section-body p { margin: 10px 0; }
.keypoints {
  list-style: none;
  padding: 14px 18px;
  margin: 18px 0;
  background: var(--bg-2);
  border-left: 3px solid var(--cyan);
  border-radius: 0 6px 6px 0;
}
.keypoints li {
  padding: 4px 0 4px 22px;
  position: relative;
  color: var(--ink);
  font-size: 14px;
}
.keypoints li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-family: var(--font-mono);
}
.keypoints-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 6px;
}

/* ────────────── MCQ ────────────── */

.mcq {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 14px;
}
.mcq .q {
  font-weight: 500;
  margin-bottom: 14px;
  display: flex;
  gap: 10px;
}
.mcq .qn {
  font-family: var(--font-mono);
  color: var(--cyan);
  flex-shrink: 0;
}
.mcq .opt {
  display: block;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  margin: 6px 0;
  cursor: pointer;
  font-size: 14px;
  transition: border-color 0.12s, background 0.12s;
}
.mcq .opt:hover { border-color: var(--cyan); background: var(--cyan-dim); }
.mcq .opt.chosen-correct {
  border-color: var(--green);
  background: var(--green-dim);
}
.mcq .opt.chosen-wrong {
  border-color: var(--red);
  background: var(--red-dim);
}
.mcq .opt.was-correct {
  border-color: var(--green);
  border-style: dashed;
}
.mcq .opt.locked { cursor: default; }
.mcq .explain {
  margin-top: 10px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-2);
  border-left: 2px solid var(--cyan);
  border-radius: 0 6px 6px 0;
  color: var(--ink-dim);
}
.mcq .explain::before { content: '$ explanation › '; color: var(--cyan); }

/* ────────────── WORKBOOK / FORMS ────────────── */

.wb-tool {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}
.wb-tool-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.wb-tool-head .kind {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-dim);
  padding: 2px 8px;
  border-radius: 3px;
}
.wb-tool h3 {
  font-family: var(--font-mono);
  font-weight: 700;
  margin: 0;
  font-size: 17px;
}
.wb-desc { color: var(--ink-dim); font-size: 14px; margin: 6px 0 18px; }
.wb-static {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink-dim);
  background: var(--bg-2);
  padding: 10px 14px;
  border-radius: 6px;
  margin: 8px 0;
  border-left: 2px solid var(--ink-mute);
}

.kbd {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--line);
  color: var(--cyan);
}

/* ────────────── ANNOUNCEMENTS ────────────── */

.ann {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 10px;
}
.ann-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.ann-title { font-weight: 600; margin-bottom: 4px; }
.ann-body { color: var(--ink-dim); font-size: 14px; }

/* ────────────── GRADEBOOK ────────────── */

.gradebook {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
@media (max-width: 700px) { .gradebook { grid-template-columns: repeat(2, 1fr); } }
.gradebook .gb-cell {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
}
.gradebook .gb-cell .label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.gradebook .gb-cell .val {
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--cyan);
  font-weight: 700;
}
.gradebook .gb-cell .max {
  color: var(--ink-mute);
  font-size: 14px;
}
.gradebook .gb-total {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--cyan);
  border-radius: 6px;
  padding: 16px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.gradebook .gb-total .label { font-family: var(--font-mono); color: var(--cyan); letter-spacing: 0.14em; text-transform: uppercase; font-size: 12px; }
.gradebook .gb-total .val { font-family: var(--font-mono); font-size: 36px; font-weight: 700; color: var(--cyan); }

/* ────────────── TABS ────────────── */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
  overflow-x: auto;
}
.tab {
  padding: 9px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-mute);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.12s, border-color 0.12s;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ────────────── MODAL ────────────── */

.modal-bg {
  position: fixed;
  inset: 0;
  background: rgba(6, 11, 24, 0.78);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  z-index: 50;
  padding: 20px;
}
.modal {
  background: var(--bg-1);
  border: 1px solid var(--cyan);
  border-radius: 8px;
  padding: 24px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-glow);
}
.modal h3 {
  font-family: var(--font-mono);
  margin: 0 0 14px;
  font-size: 18px;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

/* ────────────── MISC ────────────── */

.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.muted { color: var(--ink-mute); font-size: 13px; }
.spacer-sm { height: 10px; }
.spacer { height: 22px; }
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-3);
  color: var(--ink-dim);
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.06em;
  margin-right: 4px;
}
.tag.cyan { background: var(--cyan-dim); color: var(--cyan); }
.tag.green { background: var(--green-dim); color: var(--green); }
.tag.red { background: var(--red-dim); color: var(--red); }

.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--ink-mute);
  font-family: var(--font-mono);
}
.empty-state::before {
  content: '∅';
  display: block;
  font-size: 38px;
  color: var(--line-bright);
  margin-bottom: 10px;
}